What is the rotational speed of the stator's magnetic field called?

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Multiple Choice

What is the rotational speed of the stator's magnetic field called?

Explanation:
The rotational speed of the stator’s magnetic field is called synchronous speed. This is the speed at which the stator’s magnetic field would rotate when powered by the AC supply, determined by the line frequency and the number of poles: ns = 120 f / P (in RPM). For example, at 60 Hz with four poles, the synchronous speed is 1800 rpm. In an induction motor, the rotor actually spins a bit slower than this due to slip, while the stator field keeps turning at ns.

The rotational speed of the stator’s magnetic field is called synchronous speed. This is the speed at which the stator’s magnetic field would rotate when powered by the AC supply, determined by the line frequency and the number of poles: ns = 120 f / P (in RPM). For example, at 60 Hz with four poles, the synchronous speed is 1800 rpm. In an induction motor, the rotor actually spins a bit slower than this due to slip, while the stator field keeps turning at ns.

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